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DBParameterCollection.php
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DBParameterCollection.php
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<?php
namespace Nemiro\Data
{
/*
* Copyright © Aleksey Nemiro, 2015. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Represents a collections of the query parameters.
*
* @author Aleksey Nemiro <[email protected]>
* @copyright © Aleksey Nemiro, 2015. All rights reserved.
*/
class DBParameterCollection implements \ArrayAccess
{
/**
* Gets or sets parameters array.
*
* @var \array
*/
public $Items = array();
public function __construct()
{
}
/**
* Adds a new parameter to collection.
*
* @param \string|DBParameter $name The name of the parameter. For example: @field_name OR ? OR %s (only one style for one collection).
* @param mixed $value The parameter value. Default: NULL.
* @param \string|DBParameterType $type The parameter type. You can use enums from the DBParameterType class. Default: DBParameterType::String.
*
* @return DBParameter Returns instance of the added parameter.
*/
public function Add($name, $value = NULL, $type = NULL)
{
if ($this->Items == NULL) $this->Items = array();
$t = gettype($name);
if ($t == 'string')
{
$this->Items[] = new DBParameter($name, $value, $type);
}
else if ($t == 'object')
{
$this->Items[] = $name;
}
else
{
throw new \UnexpectedValueException(sprintf('Type %s is not supported. Expected string or DBParameter instance.', $t));
}
return end($this->Items); // $this->Items[count($this->Items) - 1];
}
/**
* Clears the collection.
*
* @return void
*/
public function Clear()
{
unset($this->Items);
$this->Items = array();
}
/**
* Returns types of parameters for bind_param.
*
* @return \string
*/
public function GetTypes()
{
if ($this->Items == NULL) return '';
$result = '';
foreach ($this->Items as $item)
{
$result .= $item->Type;
}
return $result;
}
/**
* Return data type array of the parameters.
*
* @return \string[]
*/
public function GetTypeArray()
{
if ($this->Items == NULL) return array();
$result = array();
foreach ($this->Items as $item)
{
$result[] = $item->Type;
}
return $result;
}
/**
* Return value array of the parameters.
*
* @return \string[]
*/
public function GetValueArray()
{
if ($this->Items == NULL) return array();
$result = array();
foreach ($this->Items as $item)
{
$result[] = &$item->Value;
}
return $result;
}
/**
* Returns parameters count.
*
* @return \int
*/
public function Count()
{
return $this->Items != NULL ? count($this->Items) : 0;
}
/**
* Checks the collection contains an element with the specified name or not.
*
* @param mixed $parameterName Parameter name to search.
*
* @return \bool
*/
public function Contains($parameterName)
{
return $this->Get($parameterName) != NULL;
}
/**
* Gets a parameter by name.
*
* @param mixed $parameterName Parameter name to search.
*
* @return DBParameter
*/
public function Get($parameterName)
{
if ($this->Items == NULL || $parameterName == NULL || $parameterName == '') return NULL;
foreach($this->Items as $item) {
if ($item->Name == $parameterName)
{
return $item;
}
}
return NULL;
}
#region ArrayAccess Members
/**
* Whether a offset exists
* Whether or not an offset exists.
*
* @param mixed $offset An offset to check for.
*
* @return \bool
*/
function offsetExists($offset)
{
return isset($this->Items[$offset]);
}
/**
* Offset to retrieve
* Returns the value at specified offset.
*
* @param mixed $offset The offset to retrieve.
*
* @return DBParameter
*/
function offsetGet($offset)
{
if(is_int($offset))
{
return isset($this->Items[$offset]) ? $this->Items[$offset] : $this->Get($offset);
}
else
{
return $this->Get($offset);
}
}
/**
* Offset to set
* Assigns a value to the specified offset.
*
* @param mixed $offset The offset to assign the value to.
* @param mixed $value The value to set.
*
* @return void
*/
function offsetSet($offset, $value)
{
$this->Items[$offset] = $value;
}
/**
* Offset to unset
* Unsets an offset.
*
* @param mixed $offset The offset to unset.
*
* @return void
*/
function offsetUnset($offset)
{
unset($this->Items[$offset]);
}
#endregion
}
}
?>